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Use Object Types and Collections
The Collection types and object types increase your efficiency by allowing for the realistic data modeling. The Complex real-world entities and relationships map directly into the object types. A well-constructed object model can improve the application performance by eliminating the table joins, decreasing the round trips, and the same.
The Client programs, involving the PL/SQL programs, can declare the objects and collections, and pass them as parameters, store them in the database, recover them, and so on. Also, by encapsulating the operations with data, the object types move data-maintenance code out of the SQL scripts and PL/SQL blocks into methods.
The Objects and collections are well-organized to store and retrieve as they can be manipulated as an entire. The object support is also integrated architecturally with the database; therefore it can take benefit of the many scalability and performance improvements built into Oracle8i.
Anatomy of a Table: Figure shows the terminology used in SQL to refer to parts of the structure of a table. As you can see, SQL has no official terms for its counterpa
Declaring Objects: You can use the object types wherever built-in types like CHAR or NUMBER can be used. In the block below, you can declare object r of type Rational. Then, yo
Cursors To execute the multi-row query, the Oracle opens an unnamed work region which stores the processing information. The cursor names the work region, access the informa
Write a pl/sql block that declares and uses cursors with parameters. In a loop, use a cursor to retrieve the department number and the department name from the departments table
Write an anonymous block that contains a PL/SQL procedure. The procedure takes two input parameter: oldZip and newZip, and it updates the zipcodes table by replacing all oldZip wit
Cursor FOR Loops In most cases that need an explicit cursor, you can simplify the coding by using a cursor FOR loop rather of the OPEN, FETCH, and CLOSE statements. A cursor FO
Product-specific Packages The Oracle and different Oracle tools are supplied with the product-specific packages which help you to build the PL/SQL-based applications. For illus
Declaring a Cursor The Forward references are not allowed in the PL/SQL. Therefore, you must declare a cursor before referencing it in other statements. Whenever you declare a
We are seeking a freelance consultant that is familiar with Appgen applications. We require exporting all our data into a format appropriate for importing into SAP Business One. Pl
Records Records are the items of the type RECORD. The Records have exclusively named fields that can store the data values of various types. And hence, a record treat associate
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